NO. 2 BIBLIOGRAPHY OF TIN. HESS 133 



NIGERIA (Continued) 



rock is gneiss cut by basalt, dolerite and pegmatite dikes. No tin ore is found in 

 place. Metallic tii\ reported as native, is always near native furnaces. An analysis 

 of a specimen of stream tin is given showing about 67 per cent SnOo. Ilmenite and 

 some monazite and zircon occur with the stream tin. 



Gives an account of the native method of working stream tin. The Niger Co. in 

 1905 produced one ton of " black tin " per day. 



857. DUNSTAN, WYNDHAM R. Tin ore from the Bautshi tin fields, Northern 



Nigeria. 



Imp. Inst. Tech. Rep. and Sci. Papers, London, 1903, p. 53. Same, Bull. Imp. 

 Inst. Great Britain, Vol. 1, 1903, London, p. 21. 



Chemical examination of a tin specimen weighing 1 pound which came from a 

 depth of 6 feet from the surface of a plain lying to the north of a range of hills 

 about 70 miles southwest of Bautshi in Northern Nigeria. Analysis showed 81.30 

 per cent tin dioxide. Extent of deposit not known. 



858. . Report on a series of mineral and vegetable products from 



Northern Nigeria. 



Colonial Reports (Miscellaneous), No. 26, 1904, London, pp. 17-18. 

 Tin ore from the Tilde area about 15 miles southwest of Badika, also gravel carrying 

 tin, from the River Gimpu, three miles west of Tilde, are analyzed and described. 



859. . Reports on the mineral survey of Southern Nigeria for 1903- 



1904 and 1904-1905. 



Colonial Reports (Miscellaneous), No. 33, 1906, London, pp. 22-29. 



Extract: Mg. Journ. Railw. Comm. Gaz., Vol. 78, 1906, London, p. 546. 



Digest: Eng. Mg. Journ., Vol. SI, 1906, New York, p. 992. 



Describes alluvial tin occurences of Uwet and Akwa-Ibama districts. Only the 

 latter contained tin deposits rich enough to warrant working, but these are described 

 as poor in comparison with other alluvial deposits. Associated with columbite, garnet, 

 ilrnenite and tourmaline, with a small amount of quartz and occasionally magnetite. 

 Conclusions drawn from examination are not of a definite character. 



860. NicoLAus, R. C. Tin -deposits of Northern Nigeria. In tin deposits 



of the world, by Sydney Fawns. 



1905, London, pp. 139-141. Written Dec. 1904. 



Found in the Naraguta and Shere Hills, outliers of the Gura Mountains In the 

 - Badiko district, Province of Bauchi, 600 miles northeast of Lokoja, situated at the 

 confluence of the Niger and Benue rivers. Occurs as coarse and fine stream tin along 

 the Cimpy or Kogin-Delume (" river tin "). Hills of granite with intrusions of 

 diabase and porphyry. Near river is a contact with coarse gray gneiss. Tin thought 

 to come from stockworks in granite. Metallic tin in nodules about the size of a 

 bean, thinly coated with Sn02, is found 15 feet below the surface of the gravels. 

 Gravels said to average 36.66 pounds stream tin per ton. Smelted with charcoal in 

 small local furnaces. The product is 99.40 tin. 



NORTH AMERICA 



See under Canada, Greenland, Mexico, Santo Domingo, United States 

 and separate States. 



NORTHERN TERRITORY 



861. ANONYMOUS. Tin at Port Darwin, Northern Territory, Australia. 



Mg. Sci. Press, Vol. 89, 1904, San Francisco, p. 273. 



A shipment of tin ore from Port Darwin is said to have carried 75 per cent tin and 

 worth about 80 per ton, it is said this was taken from an area of ground not 

 covering 25 yards (square), depth 4 feet. Open cut work; is below an outcrop of 

 quartz thickly studded with tin ore. 



